Just finished reading this new young adult novel, Leia: Princess of Alderaan (Claudia Gray, 2017). A very nice read, taking place 3 years before the events of A New Hope. The rebellion is forming, and Leia's parents Bail and Breha are at the heart of it. Leia herself is just beginning to become enmeshed in the still-behind-the-scenes struggle. She is still a young girl, not yet a Senator or Rebel leader.
Other than the Organas, Mon Mothma, Captain Antilles, and Grand Moff Tarkin, we don't know most of the other characters. There are no scenes of battle or desperate action. The book is laying the ground work for the ominous fight yet to come. Well written, good characterizations- a solid entry into my preferred canon.